diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eeec8ba..894c0ab 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,4 +41,8 @@ jobs:
     - name: Build
       run: pip install -v --no-build-isolation --config-settings=builddir=builddir .
     - name: Test
-      run: meson test --print-errorlogs -C builddir
+      run: |
+        apt-get update
+        apt-get install pari-gp
+        pip install --upgrade cypari2
+        meson test --print-errorlogs -C builddir